This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
This background has abstract texture with some similarities to wood.
Source V. Hartikainen
Subtle scratches on a light gray background.
Source Andrey Ovcharov
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen
Actually remixed from a pattern on Pixabay. But then noticed a very similar one on Openclipart.org uploaded by btj51q2.
Source Firkin
In the spirit of WWDC 2011, here is a dark iOS inspired linen pattern.
Source Atle Mo
This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Pattern produced in Paint.net using the Vibrato plug-in.
Source Firkin
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Pattern that came out of playing with the 'slinky' plug-in for Paint.net
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Prismatic Triangular Background Design Mark II 5
Source GDJ
A free green background pattern with a pattern of rhombuses on a seamless texture. Feel free to use it as a tiled background image on your web site.
Source V. Hartikainen
A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo